Alexander stew ast



(No Model.)

A. STEWART.

I LAMP. 7 No. 346,829. Patented Aug. 3, 1886.

Ii fli- WITNEEEEE INVENTDF! NITED STATES PATENT OFFICE.

LAM P.

EPECIPICATIQN forming part of Letters Patent No. 346,829, dated August3, 1886.

Application filed March 29, 1886.

T0 aZZ whom it may concern:

Be it known that I, ALEXANDER STEWART, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania,have invented certain new and useful Improvements in Lamps;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, reference being had to the accompanyingdrawings, which form part of this specification, in which Figure 1is avertical section of a lamp with my improvements applied thereto. Fig. 2is a transverse section of lampsupport.

My invention has relation to that class of lamp-burners known ascentral-draft burners, in which a circular wick is employed, and inwhich there is provided a device known as a deflector or spreader, thepurpose of which is to deflect a current of hot air as cending from themiddle of the tube over the wick and to spread the flame.

My improvements have for their object to provide a construction in whichthe deflector or spreader shall be capable of use as an extinguisher.

My invention consists in the peculiar construction and combination ofparts hereinafter fully described.

Referring to the accompanying drawings,A designates the lamp; providedwith an annular burner, 13, which has a circular wick, O. Said wick maybe a flat wick bent or curved into annular form. v

D represents the deflector or spreader, which is an annular plate havingasupportingstandard, E, which is'iitted in bearings or supports ff inthe central tube, A, of the lamp. The plate D is made integral with aconical stem, (1, which is formed with a socket, d, which receives theupper end of the standard E, so that the deflector or spreader may belifted off said standard. The standard E hasliberty of vertical movementin its bearings 0r supports f f, and it may bemoved upwardly until thebutton or collar 6 on its lower end meets the lower bearing or support,f. \Vhen the standard is at its uppermost limit of movement, thespreader is in the position which it ought to have when the lamp isburning. hen the Serial No. 196,959. (No model.)

standard is lowered, the spreader is depressed or let down so that itwill come in contact with the wick or upper part of the burner andextinguish the flame.

To produce an elevation of the spreader and standard, there is provideda transverse shaft, G, which has its hearings in the sides of thesupport or column G of the lamp, and furnished with an external buttonor thumb-piece, g, by which it may be rotated. On this shaft there isrigidly fastened an eccentric or cam, I, which is directly below thestandard, so that when the shaft G is rotated the cam will produce anelevation of said standard and raise the spreader to its normalposition. When the shaft is rotated so as to bring the smaller diameterof the cam uppermost, the standard may descend, and it will do so bygravity, and allow the deflector or spreader to fall upon the wick orburner and extinguish theflame. The cam is formed with a notch orrecess, 2', inits large side, which affords a bearing or support for theend of the standard and prevents the latter from losing its position incase the lamp is shaken while being carried, or if the support of thelamp is taken hold of by the hand and the shaft G accidentally rotatedor moved.

To insure stability in the position of the standard, or to cause it tolock on the cam when elevated, a spiral spring, K, may be placed on thestandard, encircling the latter between the button or collar eon itslower end and the lower support or bearing, f but this spring is not anecessity, and maybe dispensed with, if desired, although I prefer touse it. In its normal position the spreader is at sufficient elevationabove the upper edge of the burnerto permit the flame to burn atitsmaximum, the standard then resting upon the cam. XVhen it is desiredto extinguish the flame,the shaft G is given a half-turn by means of thebutton or thumb-pieceg on its outer or exposed end, bringing the smalldiameter of the cam uppermost. The standard and the spreader thendescend,the latter extinguishing the flame of thelamp. To relightthelamp, the spreader must be again elevated, and this is accomplished by areverse half-turn of the shaft G, bringing the large side of the camuppermost, as before. It will be noted that when the deflector orspreader descends it remains down until again elevated by a positivemotion, so that the extinguishment of the flame is assured, and thedanger or possibility of the flame springing up again, owing to thesudden ascent of the spreader after it has been lowered, is avoided.

Vhat I claim as my invention is- 1. The combination,with an Argandburner, of aspreader or deflector, avcrtically-movable standard, and aneccentric or cam mounted on a shaft located directly below saidstandard, and operating to produce an elevation of, the deflector orspreader and to support the standard, substantially as shown anddescribed.

2. The combination, with an Argand lamp or burner having a central-drafttube, of a vertically-movable deflector or spreader, a standard on whichsaid deflector is mounted, an ec centric or cam which supports saidstandard,

said eam being supported on a shaft and havhave hereunto set my handthis 22d day of March, 1886.

ALEX. STEWART. \Vitnesses:

WILL H. POWELL, R. DALE SPARHAWK.

